OpenXML Viewer. Two build errors.

1>c:\users\joecamel\documents\jobs.software\openxmlviewer-23178\source\openxmlviewer\utility\xmlhelper.h(11): fatal error C1083: Cannot open include file: 'xercesc/dom/DOM.hpp': No such file or directory
1> VML2SVG.cpp
1>c:\users\joecamel\documents\jobs.software\openxmlviewer-23178\source\openxmlviewer\utility\vml2svg.h(4): fatal error C1083: Cannot open include file: 'xercesc/util/PlatformUtils.hpp': No such file or directory

I followed the build instructions and have received these two build errors. Does anyone know how this can be solved?